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Finding the Fourth Proportional to 1,102.13, 1,521.68 and 704.01

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Solution

The fourth proportional to 1,102.13, 1,521.68 and 704.01 is: 972.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.13 : 1,521.68 = 704.01 : x
  2. Step 2: Convert to fraction form
    1,102.13/1,521.68 = 704.01/x
  3. Step 3: Cross multiply
    1,102.13x = 1,521.68 × 704.01
  4. Step 4: Simplify right side
    1,102.13x = 1,071,274.42
  5. Step 5: Solve for x
    x = 1,071,274.42/1,102.13
  6. Step 6: Final answer
    x = 972.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.